<header class="main-header">
    <!-- Logo -->
    <a class="logo">
        <!-- mini logo for sidebar mini 50x50 pixels -->
        <span class="logo-mini"><img src="/img/logo.png?v={!! time() !!}"></span>
        <!-- logo for regular state and mobile devices -->
        <span class="logo-lg"><img src="/img/logo_big.png"></span>
    </a>
    <!-- Header Navbar: style can be found in header.less -->
    <nav class="navbar navbar-static-top" role="navigation">
        <!-- Sidebar toggle button-->
        <a href="#" class="sidebar-toggle" data-toggle="offcanvas" role="button">
            <span class="sr-only">Toggle navigation</span>
        </a>

        <div class="navbar-custom-menu">
            <ul class="nav navbar-nav">
                <!-- Messages: style can be found in dropdown.less-->

                <!-- Notifications: style can be found in dropdown.less -->

                <!-- Tasks: style can be found in dropdown.less -->

                <!-- Control Sidebar Toggle Button -->
                <li>
                    <a class="log-out" href="/logout.html?_token={!! $token !!}&role={!! $role !!}"><i class="fa fa-sign-out"></i>退出</a>
                </li>
            </ul>
        </div>
    </nav>
</header>